Stephen Cass built a lockbox that opens only when the right gesture is traced with a magnet, and wrote it up for IEEE Spectrum. The sensor is SparkFun’s $100 magnetic imaging tile, a small-run board based on work by Peter Jansen.…
NestJS monorepo, eleven services. Two years ago we wrote a `@Traced()` decorator that wraps every service method in an OpenTelemetry span, plus a typed helper so attribute names come from one union type and nobody writes `userId` in one place and…
